sound/soc/codecs/wm8750.c

   1 /*
   2  * wm8750.c -- WM8750 ALSA SoC audio driver
   3  *
   4  * Copyright 2005 Openedhand Ltd.
   5  *
   6  * Author: Richard Purdie <richard@openedhand.com>
   7  *
   8  * Based on WM8753.c
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <linux/init.h>
  18 #include <linux/delay.h>
  19 #include <linux/pm.h>
  20 #include <linux/i2c.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/spi/spi.h>
  23 #include <sound/core.h>
  24 #include <sound/pcm.h>
  25 #include <sound/pcm_params.h>
  26 #include <sound/soc.h>
  27 #include <sound/soc-dapm.h>
  28 #include <sound/initval.h>
  29
  30 #include "wm8750.h"
  31
  32 #define WM8750_VERSION "0.12"
  33
  34 /* codec private data */
  35 struct wm8750_priv {
  36         unsigned int sysclk;
  37 };
  38
  39 /*
  40  * wm8750 register cache
  41  * We can't read the WM8750 register space when we
  42  * are using 2 wire for device control, so we cache them instead.
  43  */
  44 static const u16 wm8750_reg[] = {
  45         0x0097, 0x0097, 0x0079, 0x0079,  /*  0 */
  46         0x0000, 0x0008, 0x0000, 0x000a,  /*  4 */
  47         0x0000, 0x0000, 0x00ff, 0x00ff,  /*  8 */
  48         0x000f, 0x000f, 0x0000, 0x0000,  /* 12 */
  49         0x0000, 0x007b, 0x0000, 0x0032,  /* 16 */
  50         0x0000, 0x00c3, 0x00c3, 0x00c0,  /* 20 */
  51         0x0000, 0x0000, 0x0000, 0x0000,  /* 24 */
  52         0x0000, 0x0000, 0x0000, 0x0000,  /* 28 */
  53         0x0000, 0x0000, 0x0050, 0x0050,  /* 32 */
  54         0x0050, 0x0050, 0x0050, 0x0050,  /* 36 */
  55         0x0079, 0x0079, 0x0079,          /* 40 */
  56 };
  57
  58 /*
  59  * read wm8750 register cache
  60  */
  61 static inline unsigned int wm8750_read_reg_cache(struct snd_soc_codec *codec,
  62         unsigned int reg)
  63 {
  64         u16 *cache = codec->reg_cache;
  65         if (reg > WM8750_CACHE_REGNUM)
  66                 return -1;
  67         return cache[reg];
  68 }
  69
  70 /*
  71  * write wm8750 register cache
  72  */
  73 static inline void wm8750_write_reg_cache(struct snd_soc_codec *codec,
  74         unsigned int reg, unsigned int value)
  75 {
  76         u16 *cache = codec->reg_cache;
  77         if (reg > WM8750_CACHE_REGNUM)
  78                 return;
  79         cache[reg] = value;
  80 }
  81
  82 static int wm8750_write(struct snd_soc_codec *codec, unsigned int reg,
  83         unsigned int value)
  84 {
  85         u8 data[2];
  86
  87         /* data is
  88          *   D15..D9 WM8753 register offset
  89          *   D8...D0 register data
  90          */
  91         data[0] = (reg << 1) | ((value >> 8) & 0x0001);
  92         data[1] = value & 0x00ff;
  93
  94         wm8750_write_reg_cache(codec, reg, value);
  95         if (codec->hw_write(codec->control_data, data, 2) == 2)
  96                 return 0;
  97         else
  98                 return -EIO;
  99 }
 100
 101 #define wm8750_reset(c) wm8750_write(c, WM8750_RESET, 0)
 102
 103 /*
 104  * WM8750 Controls
 105  */
 106 static const char *wm8750_bass[] = {"Linear Control", "Adaptive Boost"};
 107 static const char *wm8750_bass_filter[] = { "130Hz @ 48kHz", "200Hz @ 48kHz" };
 108 static const char *wm8750_treble[] = {"8kHz", "4kHz"};
 109 static const char *wm8750_3d_lc[] = {"200Hz", "500Hz"};
 110 static const char *wm8750_3d_uc[] = {"2.2kHz", "1.5kHz"};
 111 static const char *wm8750_3d_func[] = {"Capture", "Playback"};
 112 static const char *wm8750_alc_func[] = {"Off", "Right", "Left", "Stereo"};
 113 static const char *wm8750_ng_type[] = {"Constant PGA Gain",
 114         "Mute ADC Output"};
 115 static const char *wm8750_line_mux[] = {"Line 1", "Line 2", "Line 3", "PGA",
 116         "Differential"};
 117 static const char *wm8750_pga_sel[] = {"Line 1", "Line 2", "Line 3",
 118         "Differential"};
 119 static const char *wm8750_out3[] = {"VREF", "ROUT1 + Vol", "MonoOut",
 120         "ROUT1"};
 121 static const char *wm8750_diff_sel[] = {"Line 1", "Line 2"};
 122 static const char *wm8750_adcpol[] = {"Normal", "L Invert", "R Invert",
 123         "L + R Invert"};
 124 static const char *wm8750_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 125 static const char *wm8750_mono_mux[] = {"Stereo", "Mono (Left)",
 126         "Mono (Right)", "Digital Mono"};
 127
 128 static const struct soc_enum wm8750_enum[] = {
 129 SOC_ENUM_SINGLE(WM8750_BASS, 7, 2, wm8750_bass),
 130 SOC_ENUM_SINGLE(WM8750_BASS, 6, 2, wm8750_bass_filter),
 131 SOC_ENUM_SINGLE(WM8750_TREBLE, 6, 2, wm8750_treble),
 132 SOC_ENUM_SINGLE(WM8750_3D, 5, 2, wm8750_3d_lc),
 133 SOC_ENUM_SINGLE(WM8750_3D, 6, 2, wm8750_3d_uc),
 134 SOC_ENUM_SINGLE(WM8750_3D, 7, 2, wm8750_3d_func),
 135 SOC_ENUM_SINGLE(WM8750_ALC1, 7, 4, wm8750_alc_func),
 136 SOC_ENUM_SINGLE(WM8750_NGATE, 1, 2, wm8750_ng_type),
 137 SOC_ENUM_SINGLE(WM8750_LOUTM1, 0, 5, wm8750_line_mux),
 138 SOC_ENUM_SINGLE(WM8750_ROUTM1, 0, 5, wm8750_line_mux),
 139 SOC_ENUM_SINGLE(WM8750_LADCIN, 6, 4, wm8750_pga_sel), /* 10 */
 140 SOC_ENUM_SINGLE(WM8750_RADCIN, 6, 4, wm8750_pga_sel),
 141 SOC_ENUM_SINGLE(WM8750_ADCTL2, 7, 4, wm8750_out3),
 142 SOC_ENUM_SINGLE(WM8750_ADCIN, 8, 2, wm8750_diff_sel),
 143 SOC_ENUM_SINGLE(WM8750_ADCDAC, 5, 4, wm8750_adcpol),
 144 SOC_ENUM_SINGLE(WM8750_ADCDAC, 1, 4, wm8750_deemph),
 145 SOC_ENUM_SINGLE(WM8750_ADCIN, 6, 4, wm8750_mono_mux), /* 16 */
 146
 147 };
 148
 149 static const struct snd_kcontrol_new wm8750_snd_controls[] = {
 150
 151 SOC_DOUBLE_R("Capture Volume", WM8750_LINVOL, WM8750_RINVOL, 0, 63, 0),
 152 SOC_DOUBLE_R("Capture ZC Switch", WM8750_LINVOL, WM8750_RINVOL, 6, 1, 0),
 153 SOC_DOUBLE_R("Capture Switch", WM8750_LINVOL, WM8750_RINVOL, 7, 1, 1),
 154
 155 SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8750_LOUT1V,
 156         WM8750_ROUT1V, 7, 1, 0),
 157 SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8750_LOUT2V,
 158         WM8750_ROUT2V, 7, 1, 0),
 159
 160 SOC_ENUM("Playback De-emphasis", wm8750_enum[15]),
 161
 162 SOC_ENUM("Capture Polarity", wm8750_enum[14]),
 163 SOC_SINGLE("Playback 6dB Attenuate", WM8750_ADCDAC, 7, 1, 0),
 164 SOC_SINGLE("Capture 6dB Attenuate", WM8750_ADCDAC, 8, 1, 0),
 165
 166 SOC_DOUBLE_R("PCM Volume", WM8750_LDAC, WM8750_RDAC, 0, 255, 0),
 167
 168 SOC_ENUM("Bass Boost", wm8750_enum[0]),
 169 SOC_ENUM("Bass Filter", wm8750_enum[1]),
 170 SOC_SINGLE("Bass Volume", WM8750_BASS, 0, 15, 1),
 171
 172 SOC_SINGLE("Treble Volume", WM8750_TREBLE, 0, 15, 1),
 173 SOC_ENUM("Treble Cut-off", wm8750_enum[2]),
 174
 175 SOC_SINGLE("3D Switch", WM8750_3D, 0, 1, 0),
 176 SOC_SINGLE("3D Volume", WM8750_3D, 1, 15, 0),
 177 SOC_ENUM("3D Lower Cut-off", wm8750_enum[3]),
 178 SOC_ENUM("3D Upper Cut-off", wm8750_enum[4]),
 179 SOC_ENUM("3D Mode", wm8750_enum[5]),
 180
 181 SOC_SINGLE("ALC Capture Target Volume", WM8750_ALC1, 0, 7, 0),
 182 SOC_SINGLE("ALC Capture Max Volume", WM8750_ALC1, 4, 7, 0),
 183 SOC_ENUM("ALC Capture Function", wm8750_enum[6]),
 184 SOC_SINGLE("ALC Capture ZC Switch", WM8750_ALC2, 7, 1, 0),
 185 SOC_SINGLE("ALC Capture Hold Time", WM8750_ALC2, 0, 15, 0),
 186 SOC_SINGLE("ALC Capture Decay Time", WM8750_ALC3, 4, 15, 0),
 187 SOC_SINGLE("ALC Capture Attack Time", WM8750_ALC3, 0, 15, 0),
 188 SOC_SINGLE("ALC Capture NG Threshold", WM8750_NGATE, 3, 31, 0),
 189 SOC_ENUM("ALC Capture NG Type", wm8750_enum[4]),
 190 SOC_SINGLE("ALC Capture NG Switch", WM8750_NGATE, 0, 1, 0),
 191
 192 SOC_SINGLE("Left ADC Capture Volume", WM8750_LADC, 0, 255, 0),
 193 SOC_SINGLE("Right ADC Capture Volume", WM8750_RADC, 0, 255, 0),
 194
 195 SOC_SINGLE("ZC Timeout Switch", WM8750_ADCTL1, 0, 1, 0),
 196 SOC_SINGLE("Playback Invert Switch", WM8750_ADCTL1, 1, 1, 0),
 197
 198 SOC_SINGLE("Right Speaker Playback Invert Switch", WM8750_ADCTL2, 4, 1, 0),
 199
 200 /* Unimplemented */
 201 /* ADCDAC Bit 0 - ADCHPD */
 202 /* ADCDAC Bit 4 - HPOR */
 203 /* ADCTL1 Bit 2,3 - DATSEL */
 204 /* ADCTL1 Bit 4,5 - DMONOMIX */
 205 /* ADCTL1 Bit 6,7 - VSEL */
 206 /* ADCTL2 Bit 2 - LRCM */
 207 /* ADCTL2 Bit 3 - TRI */
 208 /* ADCTL3 Bit 5 - HPFLREN */
 209 /* ADCTL3 Bit 6 - VROI */
 210 /* ADCTL3 Bit 7,8 - ADCLRM */
 211 /* ADCIN Bit 4 - LDCM */
 212 /* ADCIN Bit 5 - RDCM */
 213
 214 SOC_DOUBLE_R("Mic Boost", WM8750_LADCIN, WM8750_RADCIN, 4, 3, 0),
 215
 216 SOC_DOUBLE_R("Bypass Left Playback Volume", WM8750_LOUTM1,
 217         WM8750_LOUTM2, 4, 7, 1),
 218 SOC_DOUBLE_R("Bypass Right Playback Volume", WM8750_ROUTM1,
 219         WM8750_ROUTM2, 4, 7, 1),
 220 SOC_DOUBLE_R("Bypass Mono Playback Volume", WM8750_MOUTM1,
 221         WM8750_MOUTM2, 4, 7, 1),
 222
 223 SOC_SINGLE("Mono Playback ZC Switch", WM8750_MOUTV, 7, 1, 0),
 224
 225 SOC_DOUBLE_R("Headphone Playback Volume", WM8750_LOUT1V, WM8750_ROUT1V,
 226         0, 127, 0),
 227 SOC_DOUBLE_R("Speaker Playback Volume", WM8750_LOUT2V, WM8750_ROUT2V,
 228         0, 127, 0),
 229
 230 SOC_SINGLE("Mono Playback Volume", WM8750_MOUTV, 0, 127, 0),
 231
 232 };
 233
 234 /* add non dapm controls */
 235 static int wm8750_add_controls(struct snd_soc_codec *codec)
 236 {
 237         int err, i;
 238
 239         for (i = 0; i < ARRAY_SIZE(wm8750_snd_controls); i++) {
 240                 err = snd_ctl_add(codec->card,
 241                                 snd_soc_cnew(&wm8750_snd_controls[i],
 242                                                 codec, NULL));
 243                 if (err < 0)
 244                         return err;
 245         }
 246         return 0;
 247 }
 248
 249 /*
 250  * DAPM Controls
 251  */
 252
 253 /* Left Mixer */
 254 static const struct snd_kcontrol_new wm8750_left_mixer_controls[] = {
 255 SOC_DAPM_SINGLE("Playback Switch", WM8750_LOUTM1, 8, 1, 0),
 256 SOC_DAPM_SINGLE("Left Bypass Switch", WM8750_LOUTM1, 7, 1, 0),
 257 SOC_DAPM_SINGLE("Right Playback Switch", WM8750_LOUTM2, 8, 1, 0),
 258 SOC_DAPM_SINGLE("Right Bypass Switch", WM8750_LOUTM2, 7, 1, 0),
 259 };
 260
 261 /* Right Mixer */
 262 static const struct snd_kcontrol_new wm8750_right_mixer_controls[] = {
 263 SOC_DAPM_SINGLE("Left Playback Switch", WM8750_ROUTM1, 8, 1, 0),
 264 SOC_DAPM_SINGLE("Left Bypass Switch", WM8750_ROUTM1, 7, 1, 0),
 265 SOC_DAPM_SINGLE("Playback Switch", WM8750_ROUTM2, 8, 1, 0),
 266 SOC_DAPM_SINGLE("Right Bypass Switch", WM8750_ROUTM2, 7, 1, 0),
 267 };
 268
 269 /* Mono Mixer */
 270 static const struct snd_kcontrol_new wm8750_mono_mixer_controls[] = {
 271 SOC_DAPM_SINGLE("Left Playback Switch", WM8750_MOUTM1, 8, 1, 0),
 272 SOC_DAPM_SINGLE("Left Bypass Switch", WM8750_MOUTM1, 7, 1, 0),
 273 SOC_DAPM_SINGLE("Right Playback Switch", WM8750_MOUTM2, 8, 1, 0),
 274 SOC_DAPM_SINGLE("Right Bypass Switch", WM8750_MOUTM2, 7, 1, 0),
 275 };
 276
 277 /* Left Line Mux */
 278 static const struct snd_kcontrol_new wm8750_left_line_controls =
 279 SOC_DAPM_ENUM("Route", wm8750_enum[8]);
 280
 281 /* Right Line Mux */
 282 static const struct snd_kcontrol_new wm8750_right_line_controls =
 283 SOC_DAPM_ENUM("Route", wm8750_enum[9]);
 284
 285 /* Left PGA Mux */
 286 static const struct snd_kcontrol_new wm8750_left_pga_controls =
 287 SOC_DAPM_ENUM("Route", wm8750_enum[10]);
 288
 289 /* Right PGA Mux */
 290 static const struct snd_kcontrol_new wm8750_right_pga_controls =
 291 SOC_DAPM_ENUM("Route", wm8750_enum[11]);
 292
 293 /* Out 3 Mux */
 294 static const struct snd_kcontrol_new wm8750_out3_controls =
 295 SOC_DAPM_ENUM("Route", wm8750_enum[12]);
 296
 297 /* Differential Mux */
 298 static const struct snd_kcontrol_new wm8750_diffmux_controls =
 299 SOC_DAPM_ENUM("Route", wm8750_enum[13]);
 300
 301 /* Mono ADC Mux */
 302 static const struct snd_kcontrol_new wm8750_monomux_controls =
 303 SOC_DAPM_ENUM("Route", wm8750_enum[16]);
 304
 305 static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
 306         SND_SOC_DAPM_MIXER("Left Mixer", SND_SOC_NOPM, 0, 0,
 307                 &wm8750_left_mixer_controls[0],
 308                 ARRAY_SIZE(wm8750_left_mixer_controls)),
 309         SND_SOC_DAPM_MIXER("Right Mixer", SND_SOC_NOPM, 0, 0,
 310                 &wm8750_right_mixer_controls[0],
 311                 ARRAY_SIZE(wm8750_right_mixer_controls)),
 312         SND_SOC_DAPM_MIXER("Mono Mixer", WM8750_PWR2, 2, 0,
 313                 &wm8750_mono_mixer_controls[0],
 314                 ARRAY_SIZE(wm8750_mono_mixer_controls)),
 315
 316         SND_SOC_DAPM_PGA("Right Out 2", WM8750_PWR2, 3, 0, NULL, 0),
 317         SND_SOC_DAPM_PGA("Left Out 2", WM8750_PWR2, 4, 0, NULL, 0),
 318         SND_SOC_DAPM_PGA("Right Out 1", WM8750_PWR2, 5, 0, NULL, 0),
 319         SND_SOC_DAPM_PGA("Left Out 1", WM8750_PWR2, 6, 0, NULL, 0),
 320         SND_SOC_DAPM_DAC("Right DAC", "Right Playback", WM8750_PWR2, 7, 0),
 321         SND_SOC_DAPM_DAC("Left DAC", "Left Playback", WM8750_PWR2, 8, 0),
 322
 323         SND_SOC_DAPM_MICBIAS("Mic Bias", WM8750_PWR1, 1, 0),
 324         SND_SOC_DAPM_ADC("Right ADC", "Right Capture", WM8750_PWR1, 2, 0),
 325         SND_SOC_DAPM_ADC("Left ADC", "Left Capture", WM8750_PWR1, 3, 0),
 326
 327         SND_SOC_DAPM_MUX("Left PGA Mux", WM8750_PWR1, 5, 0,
 328                 &wm8750_left_pga_controls),
 329         SND_SOC_DAPM_MUX("Right PGA Mux", WM8750_PWR1, 4, 0,
 330                 &wm8750_right_pga_controls),
 331         SND_SOC_DAPM_MUX("Left Line Mux", SND_SOC_NOPM, 0, 0,
 332                 &wm8750_left_line_controls),
 333         SND_SOC_DAPM_MUX("Right Line Mux", SND_SOC_NOPM, 0, 0,
 334                 &wm8750_right_line_controls),
 335
 336         SND_SOC_DAPM_MUX("Out3 Mux", SND_SOC_NOPM, 0, 0, &wm8750_out3_controls),
 337         SND_SOC_DAPM_PGA("Out 3", WM8750_PWR2, 1, 0, NULL, 0),
 338         SND_SOC_DAPM_PGA("Mono Out 1", WM8750_PWR2, 2, 0, NULL, 0),
 339
 340         SND_SOC_DAPM_MUX("Differential Mux", SND_SOC_NOPM, 0, 0,
 341                 &wm8750_diffmux_controls),
 342         SND_SOC_DAPM_MUX("Left ADC Mux", SND_SOC_NOPM, 0, 0,
 343                 &wm8750_monomux_controls),
 344         SND_SOC_DAPM_MUX("Right ADC Mux", SND_SOC_NOPM, 0, 0,
 345                 &wm8750_monomux_controls),
 346
 347         SND_SOC_DAPM_OUTPUT("LOUT1"),
 348         SND_SOC_DAPM_OUTPUT("ROUT1"),
 349         SND_SOC_DAPM_OUTPUT("LOUT2"),
 350         SND_SOC_DAPM_OUTPUT("ROUT2"),
 351         SND_SOC_DAPM_OUTPUT("MONO1"),
 352         SND_SOC_DAPM_OUTPUT("OUT3"),
 353         SND_SOC_DAPM_OUTPUT("VREF"),
 354
 355         SND_SOC_DAPM_INPUT("LINPUT1"),
 356         SND_SOC_DAPM_INPUT("LINPUT2"),
 357         SND_SOC_DAPM_INPUT("LINPUT3"),
 358         SND_SOC_DAPM_INPUT("RINPUT1"),
 359         SND_SOC_DAPM_INPUT("RINPUT2"),
 360         SND_SOC_DAPM_INPUT("RINPUT3"),
 361 };
 362
 363 static const struct snd_soc_dapm_route audio_map[] = {
 364         /* left mixer */
 365         {"Left Mixer", "Playback Switch", "Left DAC"},
 366         {"Left Mixer", "Left Bypass Switch", "Left Line Mux"},
 367         {"Left Mixer", "Right Playback Switch", "Right DAC"},
 368         {"Left Mixer", "Right Bypass Switch", "Right Line Mux"},
 369
 370         /* right mixer */
 371         {"Right Mixer", "Left Playback Switch", "Left DAC"},
 372         {"Right Mixer", "Left Bypass Switch", "Left Line Mux"},
 373         {"Right Mixer", "Playback Switch", "Right DAC"},
 374         {"Right Mixer", "Right Bypass Switch", "Right Line Mux"},
 375
 376         /* left out 1 */
 377         {"Left Out 1", NULL, "Left Mixer"},
 378         {"LOUT1", NULL, "Left Out 1"},
 379
 380         /* left out 2 */
 381         {"Left Out 2", NULL, "Left Mixer"},
 382         {"LOUT2", NULL, "Left Out 2"},
 383
 384         /* right out 1 */
 385         {"Right Out 1", NULL, "Right Mixer"},
 386         {"ROUT1", NULL, "Right Out 1"},
 387
 388         /* right out 2 */
 389         {"Right Out 2", NULL, "Right Mixer"},
 390         {"ROUT2", NULL, "Right Out 2"},
 391
 392         /* mono mixer */
 393         {"Mono Mixer", "Left Playback Switch", "Left DAC"},
 394         {"Mono Mixer", "Left Bypass Switch", "Left Line Mux"},
 395         {"Mono Mixer", "Right Playback Switch", "Right DAC"},
 396         {"Mono Mixer", "Right Bypass Switch", "Right Line Mux"},
 397
 398         /* mono out */
 399         {"Mono Out 1", NULL, "Mono Mixer"},
 400         {"MONO1", NULL, "Mono Out 1"},
 401
 402         /* out 3 */
 403         {"Out3 Mux", "VREF", "VREF"},
 404         {"Out3 Mux", "ROUT1 + Vol", "ROUT1"},
 405         {"Out3 Mux", "ROUT1", "Right Mixer"},
 406         {"Out3 Mux", "MonoOut", "MONO1"},
 407         {"Out 3", NULL, "Out3 Mux"},
 408         {"OUT3", NULL, "Out 3"},
 409
 410         /* Left Line Mux */
 411         {"Left Line Mux", "Line 1", "LINPUT1"},
 412         {"Left Line Mux", "Line 2", "LINPUT2"},
 413         {"Left Line Mux", "Line 3", "LINPUT3"},
 414         {"Left Line Mux", "PGA", "Left PGA Mux"},
 415         {"Left Line Mux", "Differential", "Differential Mux"},
 416
 417         /* Right Line Mux */
 418         {"Right Line Mux", "Line 1", "RINPUT1"},
 419         {"Right Line Mux", "Line 2", "RINPUT2"},
 420         {"Right Line Mux", "Line 3", "RINPUT3"},
 421         {"Right Line Mux", "PGA", "Right PGA Mux"},
 422         {"Right Line Mux", "Differential", "Differential Mux"},
 423
 424         /* Left PGA Mux */
 425         {"Left PGA Mux", "Line 1", "LINPUT1"},
 426         {"Left PGA Mux", "Line 2", "LINPUT2"},
 427         {"Left PGA Mux", "Line 3", "LINPUT3"},
 428         {"Left PGA Mux", "Differential", "Differential Mux"},
 429
 430         /* Right PGA Mux */
 431         {"Right PGA Mux", "Line 1", "RINPUT1"},
 432         {"Right PGA Mux", "Line 2", "RINPUT2"},
 433         {"Right PGA Mux", "Line 3", "RINPUT3"},
 434         {"Right PGA Mux", "Differential", "Differential Mux"},
 435
 436         /* Differential Mux */
 437         {"Differential Mux", "Line 1", "LINPUT1"},
 438         {"Differential Mux", "Line 1", "RINPUT1"},
 439         {"Differential Mux", "Line 2", "LINPUT2"},
 440         {"Differential Mux", "Line 2", "RINPUT2"},
 441
 442         /* Left ADC Mux */
 443         {"Left ADC Mux", "Stereo", "Left PGA Mux"},
 444         {"Left ADC Mux", "Mono (Left)", "Left PGA Mux"},
 445         {"Left ADC Mux", "Digital Mono", "Left PGA Mux"},
 446
 447         /* Right ADC Mux */
 448         {"Right ADC Mux", "Stereo", "Right PGA Mux"},
 449         {"Right ADC Mux", "Mono (Right)", "Right PGA Mux"},
 450         {"Right ADC Mux", "Digital Mono", "Right PGA Mux"},
 451
 452         /* ADC */
 453         {"Left ADC", NULL, "Left ADC Mux"},
 454         {"Right ADC", NULL, "Right ADC Mux"},
 455 };
 456
 457 static int wm8750_add_widgets(struct snd_soc_codec *codec)
 458 {
 459         snd_soc_dapm_new_controls(codec, wm8750_dapm_widgets,
 460                                   ARRAY_SIZE(wm8750_dapm_widgets));
 461
 462         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 463
 464         snd_soc_dapm_new_widgets(codec);
 465         return 0;
 466 }
 467
 468 struct _coeff_div {
 469         u32 mclk;
 470         u32 rate;
 471         u16 fs;
 472         u8 sr:5;
 473         u8 usb:1;
 474 };
 475
 476 /* codec hifi mclk clock divider coefficients */
 477 static const struct _coeff_div coeff_div[] = {
 478         /* 8k */
 479         {12288000, 8000, 1536, 0x6, 0x0},
 480         {11289600, 8000, 1408, 0x16, 0x0},
 481         {18432000, 8000, 2304, 0x7, 0x0},
 482         {16934400, 8000, 2112, 0x17, 0x0},
 483         {12000000, 8000, 1500, 0x6, 0x1},
 484
 485         /* 11.025k */
 486         {11289600, 11025, 1024, 0x18, 0x0},
 487         {16934400, 11025, 1536, 0x19, 0x0},
 488         {12000000, 11025, 1088, 0x19, 0x1},
 489
 490         /* 16k */
 491         {12288000, 16000, 768, 0xa, 0x0},
 492         {18432000, 16000, 1152, 0xb, 0x0},
 493         {12000000, 16000, 750, 0xa, 0x1},
 494
 495         /* 22.05k */
 496         {11289600, 22050, 512, 0x1a, 0x0},
 497         {16934400, 22050, 768, 0x1b, 0x0},
 498         {12000000, 22050, 544, 0x1b, 0x1},
 499
 500         /* 32k */
 501         {12288000, 32000, 384, 0xc, 0x0},
 502         {18432000, 32000, 576, 0xd, 0x0},
 503         {12000000, 32000, 375, 0xa, 0x1},
 504
 505         /* 44.1k */
 506         {11289600, 44100, 256, 0x10, 0x0},
 507         {16934400, 44100, 384, 0x11, 0x0},
 508         {12000000, 44100, 272, 0x11, 0x1},
 509
 510         /* 48k */
 511         {12288000, 48000, 256, 0x0, 0x0},
 512         {18432000, 48000, 384, 0x1, 0x0},
 513         {12000000, 48000, 250, 0x0, 0x1},
 514
 515         /* 88.2k */
 516         {11289600, 88200, 128, 0x1e, 0x0},
 517         {16934400, 88200, 192, 0x1f, 0x0},
 518         {12000000, 88200, 136, 0x1f, 0x1},
 519
 520         /* 96k */
 521         {12288000, 96000, 128, 0xe, 0x0},
 522         {18432000, 96000, 192, 0xf, 0x0},
 523         {12000000, 96000, 125, 0xe, 0x1},
 524 };
 525
 526 static inline int get_coeff(int mclk, int rate)
 527 {
 528         int i;
 529
 530         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 531                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 532                         return i;
 533         }
 534
 535         printk(KERN_ERR "wm8750: could not get coeff for mclk %d @ rate %d\n",
 536                 mclk, rate);
 537         return -EINVAL;
 538 }
 539
 540 static int wm8750_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 541                 int clk_id, unsigned int freq, int dir)
 542 {
 543         struct snd_soc_codec *codec = codec_dai->codec;
 544         struct wm8750_priv *wm8750 = codec->private_data;
 545
 546         switch (freq) {
 547         case 11289600:
 548         case 12000000:
 549         case 12288000:
 550         case 16934400:
 551         case 18432000:
 552                 wm8750->sysclk = freq;
 553                 return 0;
 554         }
 555         return -EINVAL;
 556 }
 557
 558 static int wm8750_set_dai_fmt(struct snd_soc_dai *codec_dai,
 559                 unsigned int fmt)
 560 {
 561         struct snd_soc_codec *codec = codec_dai->codec;
 562         u16 iface = 0;
 563
 564         /* set master/slave audio interface */
 565         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 566         case SND_SOC_DAIFMT_CBM_CFM:
 567                 iface = 0x0040;
 568                 break;
 569         case SND_SOC_DAIFMT_CBS_CFS:
 570                 break;
 571         default:
 572                 return -EINVAL;
 573         }
 574
 575         /* interface format */
 576         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 577         case SND_SOC_DAIFMT_I2S:
 578                 iface |= 0x0002;
 579                 break;
 580         case SND_SOC_DAIFMT_RIGHT_J:
 581                 break;
 582         case SND_SOC_DAIFMT_LEFT_J:
 583                 iface |= 0x0001;
 584                 break;
 585         case SND_SOC_DAIFMT_DSP_A:
 586                 iface |= 0x0003;
 587                 break;
 588         case SND_SOC_DAIFMT_DSP_B:
 589                 iface |= 0x0013;
 590                 break;
 591         default:
 592                 return -EINVAL;
 593         }
 594
 595         /* clock inversion */
 596         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 597         case SND_SOC_DAIFMT_NB_NF:
 598                 break;
 599         case SND_SOC_DAIFMT_IB_IF:
 600                 iface |= 0x0090;
 601                 break;
 602         case SND_SOC_DAIFMT_IB_NF:
 603                 iface |= 0x0080;
 604                 break;
 605         case SND_SOC_DAIFMT_NB_IF:
 606                 iface |= 0x0010;
 607                 break;
 608         default:
 609                 return -EINVAL;
 610         }
 611
 612         wm8750_write(codec, WM8750_IFACE, iface);
 613         return 0;
 614 }
 615
 616 static int wm8750_pcm_hw_params(struct snd_pcm_substream *substream,
 617         struct snd_pcm_hw_params *params)
 618 {
 619         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 620         struct snd_soc_device *socdev = rtd->socdev;
 621         struct snd_soc_codec *codec = socdev->codec;
 622         struct wm8750_priv *wm8750 = codec->private_data;
 623         u16 iface = wm8750_read_reg_cache(codec, WM8750_IFACE) & 0x1f3;
 624         u16 srate = wm8750_read_reg_cache(codec, WM8750_SRATE) & 0x1c0;
 625         int coeff = get_coeff(wm8750->sysclk, params_rate(params));
 626
 627         /* bit size */
 628         switch (params_format(params)) {
 629         case SNDRV_PCM_FORMAT_S16_LE:
 630                 break;
 631         case SNDRV_PCM_FORMAT_S20_3LE:
 632                 iface |= 0x0004;
 633                 break;
 634         case SNDRV_PCM_FORMAT_S24_LE:
 635                 iface |= 0x0008;
 636                 break;
 637         case SNDRV_PCM_FORMAT_S32_LE:
 638                 iface |= 0x000c;
 639                 break;
 640         }
 641
 642         /* set iface & srate */
 643         wm8750_write(codec, WM8750_IFACE, iface);
 644         if (coeff >= 0)
 645                 wm8750_write(codec, WM8750_SRATE, srate |
 646                         (coeff_div[coeff].sr << 1) | coeff_div[coeff].usb);
 647
 648         return 0;
 649 }
 650
 651 static int wm8750_mute(struct snd_soc_dai *dai, int mute)
 652 {
 653         struct snd_soc_codec *codec = dai->codec;
 654         u16 mute_reg = wm8750_read_reg_cache(codec, WM8750_ADCDAC) & 0xfff7;
 655
 656         if (mute)
 657                 wm8750_write(codec, WM8750_ADCDAC, mute_reg | 0x8);
 658         else
 659                 wm8750_write(codec, WM8750_ADCDAC, mute_reg);
 660         return 0;
 661 }
 662
 663 static int wm8750_set_bias_level(struct snd_soc_codec *codec,
 664                                  enum snd_soc_bias_level level)
 665 {
 666         u16 pwr_reg = wm8750_read_reg_cache(codec, WM8750_PWR1) & 0xfe3e;
 667
 668         switch (level) {
 669         case SND_SOC_BIAS_ON:
 670                 /* set vmid to 50k and unmute dac */
 671                 wm8750_write(codec, WM8750_PWR1, pwr_reg | 0x00c0);
 672                 break;
 673         case SND_SOC_BIAS_PREPARE:
 674                 /* set vmid to 5k for quick power up */
 675                 wm8750_write(codec, WM8750_PWR1, pwr_reg | 0x01c1);
 676                 break;
 677         case SND_SOC_BIAS_STANDBY:
 678                 /* mute dac and set vmid to 500k, enable VREF */
 679                 wm8750_write(codec, WM8750_PWR1, pwr_reg | 0x0141);
 680                 break;
 681         case SND_SOC_BIAS_OFF:
 682                 wm8750_write(codec, WM8750_PWR1, 0x0001);
 683                 break;
 684         }
 685         codec->bias_level = level;
 686         return 0;
 687 }
 688
 689 #define WM8750_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 690         SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
 691         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
 692
 693 #define WM8750_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 694         SNDRV_PCM_FMTBIT_S24_LE)
 695
 696 struct snd_soc_dai wm8750_dai = {
 697         .name = "WM8750",
 698         .playback = {
 699                 .stream_name = "Playback",
 700                 .channels_min = 1,
 701                 .channels_max = 2,
 702                 .rates = WM8750_RATES,
 703                 .formats = WM8750_FORMATS,},
 704         .capture = {
 705                 .stream_name = "Capture",
 706                 .channels_min = 1,
 707                 .channels_max = 2,
 708                 .rates = WM8750_RATES,
 709                 .formats = WM8750_FORMATS,},
 710         .ops = {
 711                 .hw_params = wm8750_pcm_hw_params,
 712         },
 713         .dai_ops = {
 714                 .digital_mute = wm8750_mute,
 715                 .set_fmt = wm8750_set_dai_fmt,
 716                 .set_sysclk = wm8750_set_dai_sysclk,
 717         },
 718 };
 719 EXPORT_SYMBOL_GPL(wm8750_dai);
 720
 721 static void wm8750_work(struct work_struct *work)
 722 {
 723         struct snd_soc_codec *codec =
 724                 container_of(work, struct snd_soc_codec, delayed_work.work);
 725         wm8750_set_bias_level(codec, codec->bias_level);
 726 }
 727
 728 static int wm8750_suspend(struct platform_device *pdev, pm_message_t state)
 729 {
 730         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 731         struct snd_soc_codec *codec = socdev->codec;
 732
 733         wm8750_set_bias_level(codec, SND_SOC_BIAS_OFF);
 734         return 0;
 735 }
 736
 737 static int wm8750_resume(struct platform_device *pdev)
 738 {
 739         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 740         struct snd_soc_codec *codec = socdev->codec;
 741         int i;
 742         u8 data[2];
 743         u16 *cache = codec->reg_cache;
 744
 745         /* Sync reg_cache with the hardware */
 746         for (i = 0; i < ARRAY_SIZE(wm8750_reg); i++) {
 747                 if (i == WM8750_RESET)
 748                         continue;
 749                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 750                 data[1] = cache[i] & 0x00ff;
 751                 codec->hw_write(codec->control_data, data, 2);
 752         }
 753
 754         wm8750_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 755
 756         /* charge wm8750 caps */
 757         if (codec->suspend_bias_level == SND_SOC_BIAS_ON) {
 758                 wm8750_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
 759                 codec->bias_level = SND_SOC_BIAS_ON;
 760                 schedule_delayed_work(&codec->delayed_work,
 761                                         msecs_to_jiffies(1000));
 762         }
 763
 764         return 0;
 765 }
 766
 767 /*
 768  * initialise the WM8750 driver
 769  * register the mixer and dsp interfaces with the kernel
 770  */
 771 static int wm8750_init(struct snd_soc_device *socdev)
 772 {
 773         struct snd_soc_codec *codec = socdev->codec;
 774         int reg, ret = 0;
 775
 776         codec->name = "WM8750";
 777         codec->owner = THIS_MODULE;
 778         codec->read = wm8750_read_reg_cache;
 779         codec->write = wm8750_write;
 780         codec->set_bias_level = wm8750_set_bias_level;
 781         codec->dai = &wm8750_dai;
 782         codec->num_dai = 1;
 783         codec->reg_cache_size = ARRAY_SIZE(wm8750_reg);
 784         codec->reg_cache = kmemdup(wm8750_reg, sizeof(wm8750_reg), GFP_KERNEL);
 785         if (codec->reg_cache == NULL)
 786                 return -ENOMEM;
 787
 788         wm8750_reset(codec);
 789
 790         /* register pcms */
 791         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 792         if (ret < 0) {
 793                 printk(KERN_ERR "wm8750: failed to create pcms\n");
 794                 goto pcm_err;
 795         }
 796
 797         /* charge output caps */
 798         wm8750_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
 799         codec->bias_level = SND_SOC_BIAS_STANDBY;
 800         schedule_delayed_work(&codec->delayed_work, msecs_to_jiffies(1000));
 801
 802         /* set the update bits */
 803         reg = wm8750_read_reg_cache(codec, WM8750_LDAC);
 804         wm8750_write(codec, WM8750_LDAC, reg | 0x0100);
 805         reg = wm8750_read_reg_cache(codec, WM8750_RDAC);
 806         wm8750_write(codec, WM8750_RDAC, reg | 0x0100);
 807         reg = wm8750_read_reg_cache(codec, WM8750_LOUT1V);
 808         wm8750_write(codec, WM8750_LOUT1V, reg | 0x0100);
 809         reg = wm8750_read_reg_cache(codec, WM8750_ROUT1V);
 810         wm8750_write(codec, WM8750_ROUT1V, reg | 0x0100);
 811         reg = wm8750_read_reg_cache(codec, WM8750_LOUT2V);
 812         wm8750_write(codec, WM8750_LOUT2V, reg | 0x0100);
 813         reg = wm8750_read_reg_cache(codec, WM8750_ROUT2V);
 814         wm8750_write(codec, WM8750_ROUT2V, reg | 0x0100);
 815         reg = wm8750_read_reg_cache(codec, WM8750_LINVOL);
 816         wm8750_write(codec, WM8750_LINVOL, reg | 0x0100);
 817         reg = wm8750_read_reg_cache(codec, WM8750_RINVOL);
 818         wm8750_write(codec, WM8750_RINVOL, reg | 0x0100);
 819
 820         wm8750_add_controls(codec);
 821         wm8750_add_widgets(codec);
 822         ret = snd_soc_register_card(socdev);
 823         if (ret < 0) {
 824                 printk(KERN_ERR "wm8750: failed to register card\n");
 825                 goto card_err;
 826         }
 827         return ret;
 828
 829 card_err:
 830         snd_soc_free_pcms(socdev);
 831         snd_soc_dapm_free(socdev);
 832 pcm_err:
 833         kfree(codec->reg_cache);
 834         return ret;
 835 }
 836
 837 /* If the i2c layer weren't so broken, we could pass this kind of data
 838    around */
 839 static struct snd_soc_device *wm8750_socdev;
 840
 841 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 842
 843 /*
 844  * WM8750 2 wire address is determined by GPIO5
 845  * state during powerup.
 846  *    low  = 0x1a
 847  *    high = 0x1b
 848  */
 849
 850 static int wm8750_i2c_probe(struct i2c_client *i2c,
 851                             const struct i2c_device_id *id)
 852 {
 853         struct snd_soc_device *socdev = wm8750_socdev;
 854         struct snd_soc_codec *codec = socdev->codec;
 855         int ret;
 856
 857         i2c_set_clientdata(i2c, codec);
 858         codec->control_data = i2c;
 859
 860         ret = wm8750_init(socdev);
 861         if (ret < 0)
 862                 pr_err("failed to initialise WM8750\n");
 863
 864         return ret;
 865 }
 866
 867 static int wm8750_i2c_remove(struct i2c_client *client)
 868 {
 869         struct snd_soc_codec *codec = i2c_get_clientdata(client);
 870         kfree(codec->reg_cache);
 871         return 0;
 872 }
 873
 874 static const struct i2c_device_id wm8750_i2c_id[] = {
 875         { "wm8750", 0 },
 876         { }
 877 };
 878 MODULE_DEVICE_TABLE(i2c, wm8750_i2c_id);
 879
 880 static struct i2c_driver wm8750_i2c_driver = {
 881         .driver = {
 882                 .name = "WM8750 I2C Codec",
 883                 .owner = THIS_MODULE,
 884         },
 885         .probe =    wm8750_i2c_probe,
 886         .remove =   wm8750_i2c_remove,
 887         .id_table = wm8750_i2c_id,
 888 };
 889
 890 static int wm8750_add_i2c_device(struct platform_device *pdev,
 891                                  const struct wm8750_setup_data *setup)
 892 {
 893         struct i2c_board_info info;
 894         struct i2c_adapter *adapter;
 895         struct i2c_client *client;
 896         int ret;
 897
 898         ret = i2c_add_driver(&wm8750_i2c_driver);
 899         if (ret != 0) {
 900                 dev_err(&pdev->dev, "can't add i2c driver\n");
 901                 return ret;
 902         }
 903
 904         memset(&info, 0, sizeof(struct i2c_board_info));
 905         info.addr = setup->i2c_address;
 906         strlcpy(info.type, "wm8750", I2C_NAME_SIZE);
 907
 908         adapter = i2c_get_adapter(setup->i2c_bus);
 909         if (!adapter) {
 910                 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
 911                         setup->i2c_bus);
 912                 goto err_driver;
 913         }
 914
 915         client = i2c_new_device(adapter, &info);
 916         i2c_put_adapter(adapter);
 917         if (!client) {
 918                 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
 919                         (unsigned int)info.addr);
 920                 goto err_driver;
 921         }
 922
 923         return 0;
 924
 925 err_driver:
 926         i2c_del_driver(&wm8750_i2c_driver);
 927         return -ENODEV;
 928 }
 929 #endif
 930
 931 #if defined(CONFIG_SPI_MASTER)
 932 static int __devinit wm8750_spi_probe(struct spi_device *spi)
 933 {
 934         struct snd_soc_device *socdev = wm8750_socdev;
 935         struct snd_soc_codec *codec = socdev->codec;
 936         int ret;
 937
 938         codec->control_data = spi;
 939
 940         ret = wm8750_init(socdev);
 941         if (ret < 0)
 942                 dev_err(&spi->dev, "failed to initialise WM8750\n");
 943
 944         return ret;
 945 }
 946
 947 static int __devexit wm8750_spi_remove(struct spi_device *spi)
 948 {
 949         return 0;
 950 }
 951
 952 static struct spi_driver wm8750_spi_driver = {
 953         .driver = {
 954                 .name   = "wm8750",
 955                 .bus    = &spi_bus_type,
 956                 .owner  = THIS_MODULE,
 957         },
 958         .probe          = wm8750_spi_probe,
 959         .remove         = __devexit_p(wm8750_spi_remove),
 960 };
 961
 962 static int wm8750_spi_write(struct spi_device *spi, const char *data, int len)
 963 {
 964         struct spi_transfer t;
 965         struct spi_message m;
 966         u8 msg[2];
 967
 968         if (len <= 0)
 969                 return 0;
 970
 971         msg[0] = data[0];
 972         msg[1] = data[1];
 973
 974         spi_message_init(&m);
 975         memset(&t, 0, (sizeof t));
 976
 977         t.tx_buf = &msg[0];
 978         t.len = len;
 979
 980         spi_message_add_tail(&t, &m);
 981         spi_sync(spi, &m);
 982
 983         return len;
 984 }
 985 #endif
 986
 987 static int wm8750_probe(struct platform_device *pdev)
 988 {
 989         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 990         struct wm8750_setup_data *setup = socdev->codec_data;
 991         struct snd_soc_codec *codec;
 992         struct wm8750_priv *wm8750;
 993         int ret;
 994
 995         pr_info("WM8750 Audio Codec %s", WM8750_VERSION);
 996         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 997         if (codec == NULL)
 998                 return -ENOMEM;
 999
1000         wm8750 = kzalloc(sizeof(struct wm8750_priv), GFP_KERNEL);
1001         if (wm8750 == NULL) {
1002                 kfree(codec);
1003                 return -ENOMEM;
1004         }
1005
1006         codec->private_data = wm8750;
1007         socdev->codec = codec;
1008         mutex_init(&codec->mutex);
1009         INIT_LIST_HEAD(&codec->dapm_widgets);
1010         INIT_LIST_HEAD(&codec->dapm_paths);
1011         wm8750_socdev = socdev;
1012         INIT_DELAYED_WORK(&codec->delayed_work, wm8750_work);
1013
1014         ret = -ENODEV;
1015
1016 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1017         if (setup->i2c_address) {
1018                 codec->hw_write = (hw_write_t)i2c_master_send;
1019                 ret = wm8750_add_i2c_device(pdev, setup);
1020         }
1021 #endif
1022 #if defined(CONFIG_SPI_MASTER)
1023         if (setup->spi) {
1024                 codec->hw_write = (hw_write_t)wm8750_spi_write;
1025                 ret = spi_register_driver(&wm8750_spi_driver);
1026                 if (ret != 0)
1027                         printk(KERN_ERR "can't add spi driver");
1028         }
1029 #endif
1030
1031         if (ret != 0) {
1032                 kfree(codec->private_data);
1033                 kfree(codec);
1034         }
1035         return ret;
1036 }
1037
1038 /*
1039  * This function forces any delayed work to be queued and run.
1040  */
1041 static int run_delayed_work(struct delayed_work *dwork)
1042 {
1043         int ret;
1044
1045         /* cancel any work waiting to be queued. */
1046         ret = cancel_delayed_work(dwork);
1047
1048         /* if there was any work waiting then we run it now and
1049          * wait for it's completion */
1050         if (ret) {
1051                 schedule_delayed_work(dwork, 0);
1052                 flush_scheduled_work();
1053         }
1054         return ret;
1055 }
1056
1057 /* power down chip */
1058 static int wm8750_remove(struct platform_device *pdev)
1059 {
1060         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1061         struct snd_soc_codec *codec = socdev->codec;
1062
1063         if (codec->control_data)
1064                 wm8750_set_bias_level(codec, SND_SOC_BIAS_OFF);
1065         run_delayed_work(&codec->delayed_work);
1066         snd_soc_free_pcms(socdev);
1067         snd_soc_dapm_free(socdev);
1068 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1069         i2c_unregister_device(codec->control_data);
1070         i2c_del_driver(&wm8750_i2c_driver);
1071 #endif
1072 #if defined(CONFIG_SPI_MASTER)
1073         spi_unregister_driver(&wm8750_spi_driver);
1074 #endif
1075         kfree(codec->private_data);
1076         kfree(codec);
1077
1078         return 0;
1079 }
1080
1081 struct snd_soc_codec_device soc_codec_dev_wm8750 = {
1082         .probe =        wm8750_probe,
1083         .remove =       wm8750_remove,
1084         .suspend =      wm8750_suspend,
1085         .resume =       wm8750_resume,
1086 };
1087 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8750);
1088
1089 MODULE_DESCRIPTION("ASoC WM8750 driver");
1090 MODULE_AUTHOR("Liam Girdwood");
1091 MODULE_LICENSE("GPL");